Getting Started¶
Unit Testing for Ansible Collections¶
The pytest-ansible
plugin allows ansible collection's unit tests to be run
with only pytest
. It offers a focused approach to testing individual Ansible
modules. With this plugin, you can write and execute unit tests specifically for
Ansible modules, ensuring the accuracy and reliability of your module code. This
is particularly useful for verifying the correctness of module behavior in
isolation.
To use pytest-ansible
, follow these steps:
- Install the plugin using [pip]:
-
Ensure you have Python 3.10 or greater, ansible-core, and pytest installed.
-
Depending on your preferred directory structure, you can clone collections into the appropriate paths.
-
Collection Tree Approach: The preferred approach is to clone the collections being developed into it's proper collection tree path. This eliminates the need for any symlinks and other collections being developed can be cloned into the same tree structure.
Note: Run
pytest
in the root of the collection directory, adjacent to the collection'sgalaxy.yml
file. -
Shallow Tree Approach:
Notes:
- Run
pytest
in the root of the collection directory, adjacent to the collection'sgalaxy.yml
file. - A collections directory will be created in the repository directory, and collection content will be linked into it.
- Run
-
Execute the unit tests using pytest:
pytest tests
Help¶
The following may be added to the collections' pyproject.toml
file to limit
warnings and set the default path for the collection's tests
[tool.pytest.ini_options]
testpaths = [
"tests",
]
filterwarnings = [
'ignore:AnsibleCollectionFinder has already been configured',
]
Information from the galaxy.yml
file is used to build the collections
directory structure and link the contents. The galaxy.yml
file should reflect
the correct collection namespace and name.
One way to detect issues without running the tests is to run:
The follow errors may be seen:
- Check the
galaxy.yml
file for an accurate namespace and name - Ensure
pytest
is being run from the collection's root directory, adjacent to thegalaxy.yml
Molecule Scenario Integration¶
This functionality assists in running Molecule scenarios
using pytest
. It
enables pytest discovery of all molecule.yml
files inside the codebase and
runs them as pytest tests. It allows you to include Molecule scenarios as part
of your pytest test suite, allowing you to thoroughly test your Ansible roles
and playbooks across different scenarios and environments.
Running molecule scenarios using pytest¶
Molecule scenarios can be tested using 2 different methods if molecule is installed.
Recommended:
Add a test_integration.py
file to the tests/integration
directory of the
ansible collection:
"""Tests for molecule scenarios."""
from __future__ import absolute_import, division, print_function
from pytest_ansible.molecule import MoleculeScenario
def test_integration(molecule_scenario: MoleculeScenario) -> None:
"""Run molecule for each scenario.
:param molecule_scenario: The molecule scenario object
"""
proc = molecule_scenario.test()
assert proc.returncode == 0
The molecule_scenario
fixture provides parameterized molecule scenarios
discovered in the collection's extensions/molecule
directory, as well as other
directories within the collection.
molecule test -s <scenario>
will be run for each scenario and a completed
subprocess returned from the test()
call.